Deadly wildfire burns in Arizona – A deadly wildfire leaves behind little but a burned-out car and the remains of a house in a Yarnell, Arizona, neighborhood on Wednesday, July 3. The fire started a week ago near Yarnell, apparently because of lightning strikes. Nineteen firefighters were killed Sunday, June 30, battling the blaze northwest of Phoenix.

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Deadly wildfire burns in Arizona – An aerial overview shows the devastation in Yarnell on July 3. Crews have begun making progress on the wildfire, which reportedly was 80% contained by Thursday night, July 4.

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Deadly wildfire burns in Arizona – Smoke from the Yarnell Hill Fire is visible from a distance on a road to Yarnell on Monday, July 1.

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Deadly wildfire burns in Arizona – Local firefighters embrace July 1 at a Prescott, Arizona, memorial service for the 19 firefighters killed in the Yarnell Hill Fire, northwest of Phoenix.

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Deadly wildfire burns in Arizona – A couple embraces during the Prescott memorial service for the fallen fighters on July 1. The elite team members' deaths on Sunday, June 30, marked the deadliest day for firefighters since the 9/11 attacks.

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Deadly wildfire burns in Arizona – Members of the community give a standing ovation as local firefighters arrive at the July 1 memorial service at Embry-Riddle Aeronautical University in Prescott.

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Deadly wildfire burns in Arizona – Toby Schultz lays flowers on July 1 at the fence of the fire station in Prescott, Arizona, the home base of 19 firefighters who died in the Yarnell Hill Fire.

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Deadly wildfire burns in Arizona – Flowers hang on the fence outside the Granite Mountain Hot Shot Crew fire station on July 1.

Despite still gusty winds and temperatures in the 90s, the Yarnell Hill Fire near Prescott was 80% contained as of Thursday evening, according to Inciweb, a federal website that disseminates information from agencies like the U.S. Forest Service and Bureau of Land Management. That's a significant upgrade from earlier in the day, when it was 45% contained.

The Yavapai County Sheriff's Department has lifted an evacuation order for residents of Peeples Valley, according to Inciweb. Those in the community of Yarnell, which is about 75 miles northwest of Phoenix, still face a mandatory evacuation order.

On average, workers are putting in 13- or 14-hour shifts but are able to sleep, shower and eat when they need to, U.S. Forest Service spokeswoman Suzanne Flory had said. "We're very safety conscious and we're very careful about not overstressing or overworking anybody and making sure they get that rest that they need."

The Arizona firefighter victims 19 photos

The Arizona firefighter victims19 photos

The Arizona firefighter victims – Nineteen firefighters, part of an elite group called the Hotshots, died while battling a wildfire about 85 miles northwest of Phoenix on Sunday, June 30. Here are the 19 victims: Andrew Ashcraft, 29.

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There are four helicopters battling the blaze, she told reporters.

Temperatures reached into the 90s on Thursday, with winds gusting in excess of 20 mph. It should get a little cooler in the coming days, with the thermostat peaking in the 80s and winds expected to be a little calmer.

There's also a chance of showers and thunderstorms for the coming week, at least.

Rain would be welcome in many ways, though thunderstorms also bring the possibility of lightning that could spark more fires. And wet conditions could also hamper efforts because people could get stuck in mud, explained National Weather Service meteorologist Jim Wallman.

The Maricopa County medical examiner's office performed autopsies and said Thursday that the causes of death for all 19 were "fire-related injuries." The manners of death were described for each as an "accident."

Plans to remember the 19 firefighters include a memorial service scheduled for Tuesday. Vice President Joe Biden will attend the service in Arizona, a senior administration official told CNN on Friday.

On Wednesday nearly 600 firefighters and support workers assigned to the fire took a brief break from their hard work to observe a moment of silence in honor of the 19 members of the Granite Mountain Hotshots, who died Sunday when the fire took a sudden, unexpected turn.

The pause coincided with the movement of a convoy of vehicles driven to the fire by the Granite Mountain team. The vehicles are being returned to Prescott, where they were based.

To start Wednesday's moment of silence, a loud alert tone sounded on firefighters' radios and an unidentified fire team commander announced, "As the crew carriers for the Granite Mountain hot shots leaves the Yarnell Hills fire and begin their journey home, all personnel in the incident will observe an operational pause, in observance of our fallen comrades."

The first official service to remember the lost firefighters will be held Tuesday in Prescott Valley. A ceremony is expected to begin at 11 a.m. local time at Tim's Toyota Center, according to CNN affiliate KPHO. The bodies are being guarded by members of the Phoenix Fire Honor Guard at the medical examiner's office in downtown Phoenix, the affiliate reported Thursday.

They were part of an elite squad confronting wildfires on the front line, setting up barriers to stop the spreading destruction. But in their unpredictable world, it doesn't take much to turn a situation deadly.